Chlorinated hydrocarbons are ____
A) toxic compounds used in pesticides and industrial solvents that cause problems in some areas of the ocean
B) created by chemosynthetic bacteria in the ocean
C) a physical resource extracted along with petroleum
D) important nutrients for some species of phytoplankton
A
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Our cognitive images affect our behavior, and influence such things as how much we like a particular place, where we travel, and the foreign policies we encourage
Indicate whether this statement is true or false.
Which of the following statements accurately describes countries with student-teacher ratios below 20 pupils per teacher?
What will be an ideal response?
When a craton is exposed at Earth's surface, it is called a ________
A) caldera B) plate C) transform fault region D) mid-ocean ridge E) continental shield
The red areas in the map below are places where
A) soil erosion due to wind is a major problem.
B) soil erosion due to water is a major problem.
C) soil is being formed faster than it is being eroded away.
D) salinization is leaving the soil ineffective for agriculture.